DE3510393C1 - Cylinder crankcase for an internal combustion engine - Google Patents
Cylinder crankcase for an internal combustion engineInfo
- Publication number
- DE3510393C1 DE3510393C1 DE19853510393 DE3510393A DE3510393C1 DE 3510393 C1 DE3510393 C1 DE 3510393C1 DE 19853510393 DE19853510393 DE 19853510393 DE 3510393 A DE3510393 A DE 3510393A DE 3510393 C1 DE3510393 C1 DE 3510393C1
- Authority
- DE
- Germany
- Prior art keywords
- cylinder
- cylinder crankcase
- internal combustion
- combustion engine
- zone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J10/00—Engine or like cylinders; Features of hollow, e.g. cylindrical, bodies in general
- F16J10/02—Cylinders designed to receive moving pistons or plungers
- F16J10/04—Running faces; Liners
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D5/00—Heat treatments of cast-iron
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/14—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes wear-resistant or pressure-resistant pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2203/00—Non-metallic inorganic materials
- F05C2203/08—Ceramics; Oxides
- F05C2203/0865—Oxide ceramics
- F05C2203/0882—Carbon, e.g. graphite
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
Patentansprüche: 1. Zylinder-Kurbelgehäuse aus Gußeisen für eine Brennkraftmaschine, dessen Zylinderlauffläche mindestens eine mittels Elektronen- oder Laserstrahlen wärmebehandelte Zone aufweist, d a d u roh g e -kennzeichnet, daß die Zone (4) aus einem Ledeburitgefüge besteht. Claims: 1. Cast iron cylinder crankcase for a Internal combustion engine, the cylinder surface of which is at least one by means of electron or laser beam has heat-treated zone, d a d u roh g e -marked, that the zone (4) consists of a Ledeburit structure.
2. Zylinder-Kurbelgehäuse nach Anspruch t, dadurch gekennzeichnet, daß sich die Zone (4) von der oberen bis zur unteren Totpunktstellung des ersten Kolbenringes (7) erstreckt. 2. cylinder crankcase according to claim t, characterized in that that the zone (4) from the top to the bottom dead center position of the first Piston ring (7) extends.
3. Zylinder-Kurbelgehäuse nach Anspruch 1, dadurch gekennzeichnet, daß die Zone (4) mit dem Ledeburitgefüge im Bewegungsbereich des ersten Kolbenringes (7) um den oberen Totpunkt angeordnet ist. 3. cylinder crankcase according to claim 1, characterized in that that the zone (4) with the ledeburit structure in the range of motion of the first piston ring (7) is arranged around top dead center.
4. Zylinder-Kurbelgehäuse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Zone (4)-aus einem engen Gitter von aus einem Ledeburitgefüge bestehenden Umschmelzpunkten (5) gebildet ist. 4. cylinder crankcase according to one of claims 1 to 3, characterized characterized in that the zone (4) consists of a narrow grid of a Ledeburit structure existing remelting points (5) is formed.
Die Erfindung betrifft ein Zylinder-Kurbelgehäuse nach dem Oberbegriff des Anspruchs 1. The invention relates to a cylinder crankcase according to the preamble of claim 1.
- Heute sind gußeiserne Zylinder-Kurbelgehäuse bekannt, deren Zylinderinnenwände in dem Bereich, welcher vom Kolben überstrichen wird, wärmebehandelte Zonen aufweisen, durch die hauptsächlich der abrasive Verschleiß der Zylinderlaufflächen verhindert werden soll. - Today, cast-iron cylinder crankcases are known, their cylinder inner walls have heat-treated zones in the area swept by the piston, which mainly prevents the abrasive wear of the cylinder sliding surfaces shall be.
Nach der DE-OS 30 29 215 wird auf einer Zylinderlauffläche mittels Laser- oder Elektronenstrahlen eine Feinrillung hergestellt, welche aus einem martensitischen Gefüge besteht. Durch die größere Härte des Martensitgefüges gegenüber dem unbehandelten Gefüge wird zwar der abrasive Verschleiß der Zylinderlaufflächen vermindert, jedoch der korrosive Verschleiß, der vor allem durch den Schwefelgehalt im Kraftstoff und im Schmieröl überwiegend im Bereich des oberen Totpunktes verursacht wird, verringert sich nur minimal. According to DE-OS 30 29 215 is on a cylinder surface means Laser or electron beams produce a fine groove, which consists of a martensitic Structure exists. Due to the greater hardness of the martensite structure compared to the untreated one The structure does reduce the abrasive wear of the cylinder running surfaces, however the corrosive wear, which is mainly caused by the sulfur content in the fuel and in the lubricating oil is mainly caused in the area of the top dead center, is reduced only minimal.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Zylinder-Kurbelgehäuse zu schaffen, dessen Zylinderlaufflächenzone nicht nur gegen abrasiven, sondern auch gegen korrosiven Verschleiß beständig ist. The invention is therefore based on the object of a cylinder crankcase to create the cylinder sliding surface zone not only against abrasive, but also is resistant to corrosive wear.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Zone aus einem Ledeburitgefüge besteht. The object is achieved according to the invention in that the zone consists of consists of a Ledeburit structure.
Durch das Umschmelzen der Zylinderlauffläche oder Teilen davon in ein Ledeburitgefüge wird neben einer abrasiven eine sehr hohe korrosive Verschleißbeständigkeit erzielt. By remelting the cylinder surface or parts of it in a Ledeburit structure becomes not only abrasive but also very high corrosive wear resistance achieved.
Ein gleichmäßiger Verschleiß der gesamten Zylinderlauffläche wird dadurch erreicht, daß die Zone mit dem Ledeburitgefüge nur im Bewegungsbereich des ersten Kolbenrings um den oberen Totpunkt angeordnet ist; denn in diesem Bereich unterliegt die Zylinderlauffläche den größten Belastungen, sowohl in mechanischer als auch in chemischer Hinsicht. A uniform wear of the entire cylinder surface is achieved by the fact that the zone with the ledeburit structure only in the area of movement of the the first piston ring is arranged around the top dead center; because in this area the cylinder running surface is subject to the greatest loads, both mechanically as well as in chemical terms.
Durch die Ausbildung der wärmebehandelten Zone als ein enges Gitter von aus einem Ledeburitgefüge bestehenden Umschmelzpunkten wird eine sehr gute Ölversorgung der behandelten Zone der Zylinderlauffläche sichergestellt. By forming the heat-treated zone as a narrow grid remelting points consisting of a Ledeburit structure result in a very good oil supply the treated zone of the cylinder running surface ensured.
Die Zeichnung zeigt ein Ausführungsbeispiel eines erfindungsgemäßen Zylinder-Kurbelgehäuses in einer ausschnittsweisen, längsgeschnittenen Darstellung. The drawing shows an embodiment of an inventive Cylinder crankcase in a detail, longitudinal section.
In ein gußeisernes Zylinder-Kurbelgehäuse 1 ist eine Zylinderlaufbuchse 2 eingebracht, auf deren Zylinderlauffläche 5 im Bereich des oberen Totpunktes eine Zone 4 angeordnet ist, welche aus einem engen Gitter von Punkten 5 besteht, die zu einem Ledeburitgefüge umgeschmolzen worden sind. In a cast-iron cylinder crankcase 1 is a cylinder liner 2 introduced, on the cylinder surface 5 in the area of top dead center a Zone 4 is arranged, which consists of a narrow grid of points 5, the have been remelted to a Ledeburit structure.
Mit Hilfe von z. B. Laserstrahlen werden einzelne Punkte auf der Zylinderlauffläche 3 im Bereich des oberen Totpunktes so stark erwärmt, daß man an diesen Stellen eine Schmelze erhält. Dadurch geht der Kohlenstoff, der im Gußeisen ungebunden in Graphitform, z. B. With the help of z. B. Laser beams are individual points on the Cylinder running surface 3 heated so much in the area of top dead center that one a melt is obtained at these points. This removes the carbon that is in cast iron unbound in graphite form, e.g. B.
lamellenartig, vorliegt, in Lösung, d. h. er wird carbidisch an das Eisen zu Zementit gebunden.lamellar, is present, in solution, d. H. he becomes carbidic to that Iron bound to cementite.
Durch eine schnelle Abkühlung der umgeschmolzenen Punkte 5 entsteht dann beim Erstarren ein Ledeburitgefüge, welches aus unzerfallenen Mischkristallen und Zementit besteht. Neben der sehr hohen korrosiven Verschleißbeständigkeit des Ledeburitgefüges wird auch, nachdem die Bereiche 6 zwischen den umgeschmolzenen Punkten 5 durch die Reibung der Kolbenringe 7 und 8 abgetragen sind, aufgrund der großen Härte des Zementits zum einen ein nur geringfügiger abrasiver Verschleiß und zum anderen eine gute Ölversorgung über die jetzt tiefer liegenden nicht umgeschmolzenen Gebiete 6, gewährleistet. Rapid cooling of the remelted points 5 results then, when solidifying, a Ledeburit structure, which consists of undisturbed mixed crystals and cementite. In addition to the very high corrosive wear resistance of the Ledeburit structure is also after the areas 6 between the remelted Points 5 are worn away by the friction of the piston rings 7 and 8, due to the the high hardness of the cementite, on the one hand, there is only slight abrasive wear and on the other hand a good oil supply via the now lower lying not remelted Areas 6, guaranteed.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853510393 DE3510393C1 (en) | 1985-03-22 | 1985-03-22 | Cylinder crankcase for an internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853510393 DE3510393C1 (en) | 1985-03-22 | 1985-03-22 | Cylinder crankcase for an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3510393C1 true DE3510393C1 (en) | 1986-04-03 |
Family
ID=6266018
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19853510393 Expired DE3510393C1 (en) | 1985-03-22 | 1985-03-22 | Cylinder crankcase for an internal combustion engine |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3510393C1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8914785U1 (en) * | 1989-12-16 | 1990-02-08 | MAN B & W Diesel AG, 8900 Augsburg | Cylinder liner |
DE3941381A1 (en) * | 1989-12-15 | 1991-06-20 | Audi Ag | CYLINDER BLOCK FOR AN INTERNAL COMBUSTION ENGINE |
DE4316012A1 (en) * | 1993-05-13 | 1994-11-17 | Gehring Gmbh & Co Maschf | Process for finishing workpiece surfaces |
DE19806689C1 (en) * | 1998-02-18 | 1999-09-16 | Daimler Chrysler Ag | Cylinder running face for piston in internal combustion engine |
DE10355685A1 (en) * | 2003-11-28 | 2005-07-14 | Gehring Gmbh & Co.Kg. | Workpiece used as a cylinder of a combustion engine comprises a tribological surface formed as a wear-resistant layer in an non-worked cylinder lining in a region |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3029215A1 (en) * | 1980-08-01 | 1982-03-11 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg | IC engine cast iron cylinder - has fine grooves on inner surface hardened in base only to improve wear characteristic |
DE3418555C1 (en) * | 1984-05-18 | 1985-07-25 | Audi AG, 8070 Ingolstadt | Process for remelting the surface of cylinders made of carbon-containing cast iron |
-
1985
- 1985-03-22 DE DE19853510393 patent/DE3510393C1/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3029215A1 (en) * | 1980-08-01 | 1982-03-11 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg | IC engine cast iron cylinder - has fine grooves on inner surface hardened in base only to improve wear characteristic |
DE3418555C1 (en) * | 1984-05-18 | 1985-07-25 | Audi AG, 8070 Ingolstadt | Process for remelting the surface of cylinders made of carbon-containing cast iron |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3941381A1 (en) * | 1989-12-15 | 1991-06-20 | Audi Ag | CYLINDER BLOCK FOR AN INTERNAL COMBUSTION ENGINE |
DE8914785U1 (en) * | 1989-12-16 | 1990-02-08 | MAN B & W Diesel AG, 8900 Augsburg | Cylinder liner |
DE4316012A1 (en) * | 1993-05-13 | 1994-11-17 | Gehring Gmbh & Co Maschf | Process for finishing workpiece surfaces |
FR2705262A1 (en) * | 1993-05-13 | 1994-11-25 | Gehring Gmbh Maschf | Processed for precision machining of workpiece surfaces. |
DE4316012C2 (en) * | 1993-05-13 | 1998-09-24 | Gehring Gmbh & Co Maschf | Process for finishing workpiece surfaces |
DE19806689C1 (en) * | 1998-02-18 | 1999-09-16 | Daimler Chrysler Ag | Cylinder running face for piston in internal combustion engine |
DE10355685A1 (en) * | 2003-11-28 | 2005-07-14 | Gehring Gmbh & Co.Kg. | Workpiece used as a cylinder of a combustion engine comprises a tribological surface formed as a wear-resistant layer in an non-worked cylinder lining in a region |
DE10355685B4 (en) * | 2003-11-28 | 2009-05-20 | Gehring Gmbh & Co.Kg. | Workpiece with a tribologically stressable surface designed as a cylinder and method for the production thereof |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of the examined application without publication of unexamined application | ||
D1 | Grant (no unexamined application published) patent law 81 | ||
8363 | Opposition against the patent | ||
8330 | Complete disclaimer |